中國畜牧學會會誌41

中國畜牧學會會誌41(增刊)	,2012
J. Chin. Soc. Anim. Sci. 12(Suppl.)

培育台灣杜洛克新品種是為了提升杜洛克豬隻繁殖性能，選用經基因選種之高畜黑公豬與配杜洛克母豬，經過雜交與級進四代選育，目前已達初步選種目標。本試驗目的是評估選育過程是否影響台灣杜洛克豬與其雜交肉豬的屠體性狀。本試驗共屠宰台灣杜洛克豬 (R) 19頭(閹公豬10頭與女豬9頭)與其雜交肉豬 LR (L♀×R♂) 25頭 (閹公豬16頭與女豬9頭)，試驗結果不分性別LR與R豬隻分別為屠體重102.19 ± 3.56與97.08 ± 3.81公斤；屠宰率87.44 ± 2.25與87.00 ± 3.66 %；瘦肉率53.48 ± 1.90與53.38 ± 2.26 %；脂肪率10.20 ± 1.96與9.45 ± 1.74 %；骨骼率15.16 ± 1.45與15.47 ± 0.97 %；背脂厚度2.18 ± 0.34與1.94 ± 0.33公分；腹脂厚度2.45 ± 0.29與2.44 ± 0.39公分；腰眼面積51.82 ± 6.74與48.45 ± 5.17平方公分；屠體長105.42 ± 2.59與101.82 ± 2.30公分；肋骨數15.38 ± 0.48與15.37 ± 0.50對。試驗結果與畜產試驗所過去研究比較，LR與R豬隻在背脂厚度、腰眼面積與屠體長等屠體性狀均不比盤克夏、藍瑞斯、約克夏、杜洛克與高畜黑豬差；另外屠宰率、瘦肉率與脂肪率有比高畜黑豬較佳的趨勢。

The breeding goal of new Taiwan Duroc boars was to enhance the reproductive performance of Duroc. The Duroc sows have mated with KHAPS Black Pig boars selected by gene selection, and the preliminary goals of breeding and selection for Taiwan Duroc boars have reached after upgrading breeding programs. The purpose of this study was to evaluate whether the carcass traits of Taiwan Duroc and its hybrids were effected by upgrading breeding process. Data on carcass traits, including carcass weight (kg), dressing percentage (%), lean percentage (%), fat percentage (%), bone percentage (%), backfat thickness (cm), abdominal fat thickness (cm), loin eye area (cm2), carcass length (cm), and pairs of ribs in 19 of Taiwan Duroc (R; 10 barrows and 9 gilts) and 25 of its hybrids LR (L ♀ × R ♂; 16 barrows and 9 gilts), were collected. Regardless of gender, the results showed that carcass weight (kg), dressing percentage (%), lean percentage (%), fat percentage (%), bone percentage (%), backfat thickness (cm), abdominal fat thickness (cm), loin eye area (cm2), carcass length (cm), and pairs of ribs in LR and R pigs were 102.19 ± 3.56 and 97.08 ± 3.81; 87.44 ± 2.25 and 87.00 ± 3.66; 53.48 ± 1.90 and 53.38 ± 2.26; 10.20 ± 1.96 and 9.45 ± 1.74; 15.16 ± 1.45 and 15.47 ± 0.97; 2.18 ± 0.34 and 1.94 ± 0.33; 2.45 ± 0.29 and 2.44 ± 0.39; 51.82 ± 6.74 and 48.45 ± 5.17; 105.42 ± 2.59 and 101.82 ± 2.30; 15.38 ± 0.48 and 15.37 ± 0.50, respectively. Here, these results were compared with the results presented from Livestock Research Institute before, the backfat thickness, loin eye area and carcass length in LR and R pigs were similar to those of Berkshire, Landrace, Yorkshire, Duroc and KHAPS Black Pig. In addition, the dressing, lean and fat percentage in LR and R pigs were better than those of KHAPS Black Pigs.